Zener Diodes

A ‌Zener Diode‌ is a specialized semiconductor device engineered to ‌maintain a stable reference voltage‌ in circuits by operating reliably in its ‌reverse breakdown region‌. Unlike standard diodes (which break down destructively under reverse bias), Zener diodes leverage controlled reverse breakdown for precise voltage regulation, surge protection, and signal clipping.

‌Core Working Principle‌:

1‌. Reverse Breakdown Mechanism‌:

Zener Effect‌: Dominates below ‌5.6V‌ – quantum tunneling of electrons across the PN junction.

Avalanche Effect‌: Dominates above ‌5.6V‌ – impact ionization creating electron "avalanches".
→ Both maintain near-constant voltage (VZ​) across the diode during reverse conduction.

2‌.Self-Recovery:

Unlike fuses or MOVs, Zener diodes revert to blocking mode when voltage drops below VZ​.

Part Number

Marking

Package

PD

W

Vz @ Izt 

Nom.
(V)

Min.
(V)

Max.
(V)

ZZT

Max.

(Ω)

 @ Izt

(mA)

ZZK

Max.

(Ω)

 @ Izk

(mA)

IR(μA)

Max.

 @VR
(V)

337A
SMC
5
4.7
4.47
4.94
2
260
450
1
5
1
338A
SMC
5
5.1
4.85
5.36
1.5
240
400
1
1
1
339A
SMC
5
5.6
5.32
5.88
1
220
400
1
1
2
340A
SMC
5
6
5.70
6.30
1
200
300
1
1
3
341A
SMC
5
6.2
5.89
6.51
1
200
200
1
1
3
342A
SMC
5
6.8
6.46
7.14
1
175
200
1
10
5.2
343A
SMC
5
7.5
7.13
7.88
1.5
175
200
1
10
5.7
344A
SMC
5
8.2
7.79
8.61
1.5
150
200
1
10
6.2
345A
SMC
5
8.7
8.27
9.14
2
150
200
1
10
6.6
346A
SMC
5
9.1
8.65
9.56
2
150
150
1
7.5
6.9
347A
SMC
5
10
9.50
10.50
2
125
125
1
5
7.6
348A
SMC
5
11
10.45
11.55
2.5
125
125
1
5
8.4
349A
SMC
5
12
11.40
12.60
2.5
100
125
1
2
9.1
350A
SMC
5
13
12.35
13.65
2.5
100
100
1
1
9.9
351A
SMC
5
14
13.30
14.70
2.5
100
75
1
1
10.6
Total 1435 < 1...929394...96 > proceed page OK

Nantong JUXIN Semiconductor Co., Ltd.

Contact: Mr.Jacky

Address: No.196, East Qingyu Road‌, Rucheng Street, Rugao-226500, Jiangsu Province, China.

Phone(Wechat): +86-15190885420

Email: info@rectifier-diode.com

 

Anhui JUXIN Semiconductor Co., Ltd.

Address: No.99,Shuanglong Road,Chizhou Economic Technology Development Zone,Anhui Province,China.


Business License
juxin

A high-quality supplier of power semiconductor chips and devices in China